August 18, 2011 Severe Weather Summary

Intense thunderstorms erupted across portions of Nebraska on the evening of Thursday, August 18, 2011, and although much of the activity remained relegated to far eastern Nebraska, some of this activity did manage to sneak into portions of central and south central Nebraska...primarily east of Highway 81.  No tornadoes were reported across central and south central Nebraska despite radar signatures suggesting strong rotation with a thunderstorm which traveled across portions of Nance, Merrick and Polk Counties.  Low-level outflow from rain-cooled air likely precluded tornadic development across these counties, but these conditions did not stop large hail and gusty thunderstorm winds from being observed near Genoa and Shelby in Nebraska.  In addition...strong winds in association with the outflow boundary were also observed across the area, with one report of 50 mph winds near Geneva just before 10:00 pm CDT.  The radar imagery below shows thunderstorm activity across the area between 7:40 and 10:15 pm CDT...

 
Below you will find a map and listing of storm reports received from across the area Thursday evening, August 18, 2011...

 

 

 



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